KR102280371B1 - Spectacle lens design method, spectacle lens manufacturing method, spectacle lens ordering device, spectacle lens ordering device, spectacle lens ordering system, progressive refractive power lens, monofocal lens - Google Patents

Abstract

A spectacle lens design method involves presenting a plurality of bokeh images created by subjecting an original image to different degrees of bokeh and making the wearer see it, acquiring information about the wearer's sensitivity to bokeh, and the wearer's bokeh and designing spectacle lenses based on the information on the sensitivity to .

Description

Spectacle lens design method, spectacle lens manufacturing method, spectacle lens ordering device, spectacle lens ordering device, spectacle lens ordering system, progressive refractive power lens, monofocal lens

The present invention relates to a spectacle lens design method, a spectacle lens manufacturing method, a spectacle lens ordering device, a spectacle lens ordering device, a spectacle lens ordering system, a progressive refractive power lens, and a monofocal lens.

In order to realize spectacle lenses suitable for the characteristics of each wearer, various design methods have been proposed. For example, in Patent Document 1, lens design standards are selected in consideration of the wearer's living environment information and the like.

International Publication No. 2009/133887

According to a first aspect of the present invention, a method for designing a spectacle lens comprises presenting a plurality of bokeh images created by subjecting an original image to different degrees of bokeh and making the wearer visually recognize it; acquiring information on sensitivity to bokeh, and designing spectacle lenses based on information on sensitivity to bokeh of the wearer.

According to the second aspect of the present invention, the spectacle lens manufacturing method designs the spectacle lens by the spectacle lens design method of the first aspect.

According to a third aspect of the present invention, the spectacle lens ordering device relates to the sensitivity of the wearer to the bokeh obtained by presenting a plurality of bokeh images created by subjecting the original image to different degrees of bokeh and making the wearer visually recognize it. An input unit for inputting information, and a transmission unit for transmitting the information input via the input unit or a design parameter calculated based on the information to the spectacle lens ordering device.

According to a fourth aspect of the present invention, the spectacle lens order receiving device relates to the sensitivity of the wearer to bokeh obtained by presenting a plurality of bokeh images created by subjecting the original image to different degrees of bokeh and making the wearer visually recognize it. A receiving unit for receiving information or a design parameter calculated based on the information, and a design unit for designing a spectacle lens based on the information or the design parameter.

According to a fifth aspect of the present invention, a spectacle lens order ordering system includes the spectacle lens ordering device according to the third aspect and the spectacle lens ordering device according to the fourth aspect.

According to a sixth aspect of the present invention, the progressive-power lens is designed by the method of setting the target aberration of the progressive-power lens based on the sensitivity information in the spectacle lens design method of the first aspect.

According to a seventh aspect of the present invention, the monofocal lens is designed by the method of setting the target aberration of the peripheral portion of the monofocal lens based on the sensitivity information in the spectacle lens design method of the first aspect. .

Fig. 1 (a) is a conceptual diagram showing an aspect of an inspection according to the design method of an embodiment when the image to be presented is at a long distance, and Fig. 1 (b) is the case when the image to be presented is at a medium distance It is a conceptual diagram which shows the aspect of a test|inspection, and Fig.1 (c) is a conceptual diagram which shows the aspect of the said test|inspection when the image to be presented is near.
Fig. 2(a) is a diagram showing an original image before processing into a bokeh image, and Fig. 2(b) is a diagram showing an example of a bokeh image.
3 is a conceptual diagram for explaining a method of creating a bokeh image.
4 is a view showing a spectacle lens ordering system.
5 is a flowchart showing a flow of a method for designing a spectacle lens according to an embodiment.
6 is a flowchart showing a flow of a method for designing a spectacle lens according to an embodiment.
7 is a diagram showing an example of an order screen.
8 is a flowchart showing a flow of a method for designing a spectacle lens according to an embodiment.
9 is a conceptual diagram showing an example of setting an aberration in a progressive-power lens.
FIG. 10A is a conceptual diagram for explaining a method of creating a direction-dependent bokeh image, and FIG. 10B is a conceptual diagram for explaining a method of creating a direction-dependent bokeh image.
11 is a conceptual diagram showing an example of setting the spherical power error and aberration in a monofocal lens, (a) is a case where astigmatism is emphasized, (b) is a case where the spherical power error and astigmatism are balanced to an intermediate degree. When setting, (c) is an example of a case where the spherical power is emphasized.

Hereinafter, a spectacle lens design method, spectacle lens manufacturing method, spectacle lens ordering device, spectacle lens ordering device, spectacle lens ordering system, and the like of one embodiment will be described with reference to the drawings as appropriate. In the following description, the unit of refractive power shall be expressed by diopter (D) unless otherwise specified. In addition, in the following description, when expressing "upper", "lower", "upper", "lower", etc. of a spectacle lens, it shall be based on the positional relationship of the lens when the spectacle lens is worn. .

1 is a diagram showing an aspect of a bokeh sensitivity test performed on a wearer of a designed spectacle lens in the spectacle lens design method of the present embodiment. In the bokeh sensitivity test, information regarding the sensitivity of the wearer W to the bokeh in the visual field is inspected. Sensitivity to bokeh is the degree of bokeh that can be tolerated by the wearer W who visually recognizes the bokeh image S when a bokeh image S in which bokeh is applied to the image of an object in various ways is created, or discomfort. It is expressed by the degree of bokeh that can be visually recognized without If the sensitivity to bokeh is strong, it is easy to feel discomfort (incongruity) even in an image with a small degree of bokeh (the range of the degree of bokeh that can be tolerated is narrow). On the other hand, if the sensitivity to bokeh is weak, it is difficult to feel discomfort (incongruity) even in an image with a large degree of bokeh (the range of the degree of bokeh that can be tolerated is wide). In the following embodiments, a case in which the wearer W measures the allowable degree of bokeh in the bokeh sensitivity test will be described as an example. In addition, the image before the bokeh is referred to as an original image So.

In an optician, an inspector who performs a bokeh sensitivity test causes the wearer W to visually see a plurality of bokeh images S and/or original images So presented at a predetermined distance from the wearer W. The plurality of bokeh images S are created by applying different degrees of bokeh to the original image So. The bokeh image S and/or the original image So is presented to the wearer W by displaying it on a display such as a tablet-type terminal, a personal computer (hereinafter referred to as a PC), or a printed material such as paper. It is preferable that the bokeh image S is visually recognized with the original image So clearly visible, and the inspector adjusts the corrected vision of the wearer W by using a corrective lens, etc., if necessary, and then the bokeh image (S) is presented.

The inspector recognizes the bokeh image S or receives a reply from the visually recognized wearer W whether the bokeh image S is acceptable orally or using an input device provided with a button or the like. The inspector, from the response of the wearer W to the plurality of bokeh images S, indicates the degree of sensitivity to the bokeh in the field of view of the wearer W by a numerical value or the like according to a predetermined standard and inputs it to the ordering device. do. That is, the bokeh image S is an image for sensitivity evaluation in which a degree of bokeh corresponding to the size of the aberration of the spectacle lens is applied.

Fig. 1 (a) is a conceptual diagram of a bokeh sensitivity test in the case where the wearer W visually recognizes the bokeh image S presented at a position at a distance (2 m in this example) from the wearer W. As shown in FIG. In Fig. 1(a), the line of sight when the wearer W visually recognizes the bokeh image S in the distance Df of 2 m with both eyes was shown typically with the solid arrow. In the long-distance bokeh sensitivity test, the distance Df from the eyes of the wearer W to the bokeh image S can be appropriately set to a distance of 1 m or more.

In addition, you may change suitably the numerical range of the distance corresponding to a long distance and a short-distance and a medium-distance which will be described later. In addition, the bokeh sensitivity test at each distance may be performed for each eye.

The bokeh image (S) presented in the long-distance bokeh sensitivity test is an image of characters, symbols, or sentences, or an image of an object that the wearer (W) recognizes from a distance in daily life or in a specific situation as the original image (So). It is preferable to write As the object visually recognized from a distance, a TV, a blackboard, a whiteboard, etc. on which the scenery, characters, and sentences are drawn can be appropriately used in a room or outdoors.

Fig. 1 (b) is a conceptual diagram of a bokeh sensitivity test in the case where the wearer W visually recognizes the bokeh image S presented at a position at an intermediate distance (80 cm in this example) from the wearer W. As shown in FIG. In FIG.1(b), the line-of-sight in the case where the wearer W visually recognizes the bokeh image S in the distance Dm of 80 cm with both eyes was shown typically with the solid arrow. In the intermediate-distance bokeh sensitivity test, the distance Dm from the wearer W's eye to the bokeh image S can be appropriately set to a distance of 50 cm or more and less than 1 m.

The bokeh image (S) presented in the mid-range bokeh sensitivity test is an image of a character, symbol, or sentence or an image of an object that the wearer (W) recognizes at a mid-range in daily life or in a specific situation as the original image (So). It is preferable to write As the object visually recognized from a medium distance, a PC screen or the like can be appropriately used.

Fig. 1 (c) is a conceptual diagram of a bokeh sensitivity test in the case where the wearer W visually recognizes the bokeh image S presented at a position at a short distance (here, 30 cm) from the wearer W. As shown in FIG. In FIG.1(c), the line-of-sight in the case where the wearer W visually recognizes the bokeh image S in the distance Dn of 30 cm with both eyes was shown typically by the solid arrow. In the near-field bokeh sensitivity test, the distance Dn from the eye of the wearer W to the bokeh image S can be appropriately set to a distance of 25 cm or more and less than 50 cm.

The bokeh image (S) presented in the near-field bokeh sensitivity test is an image of a character, symbol, or sentence or an image of an object that the wearer (W) recognizes at close range in daily life or in a specific situation as the original image (So). It is preferable to write As an example of the said target visually recognized at a short distance, mobile phones, such as a smart phone, a tablet, a magazine, newspaper, etc. can be used suitably.

The bokeh sensitivity test may be performed at one distance among a long distance, a medium distance, and a short distance, or may be performed at a plurality of distances. The bokeh sensitivity test may be performed at two or more distances selected from the group consisting of a long distance, a medium distance, and a short distance.

A progressive power lens is a spectacle lens comprising a distance part, a near part, and an intermediate part connecting the distance part and the near part so that the refractive index changes continuously, and the distance part is disposed above the middle part and the near part is disposed below the middle part. In the design of a progressive-power lens having a far portion having a refractive power corresponding to a distance and a near portion having a refractive power corresponding to the near distance, it is preferable to perform a bokeh sensitivity test on the wearer W at a distance and a short distance. . In the design of a progressive-power lens having a far portion having a refractive power corresponding to an intermediate distance and a near portion having a refractive power corresponding to the near distance, it is preferable to perform a bokeh sensitivity test on the wearer W at the intermediate and near distances. . In designing a progressive-power lens, it is preferable to use the information obtained by the bokeh sensitivity test for far or intermediate distances for the design of the far distance part, and it is preferable to use the information obtained by the near distance part for the design of the near distance part.

2 is a diagram illustrating an original image So and a bokeh image S. As shown in FIG. Fig. 2(a) shows an original image So composed of the letter "E". Fig. 2(b) is a plurality of bokeh images S created by applying different degrees of bokeh from the original image So of Fig. 2(a). The bokeh image S1 has slight outline distortion and the like, and the degree of bokeh is small. In the bokeh image S2, the outline line is not clearly recognized, and the degree of the bokeh is medium. The bokeh image S3 becomes indistinct as a whole, and the degree of the bokeh is large.

The bokeh image S is a virtual creation of a perceived image of the original image So when visually viewed through an ophthalmic optical system that generates astigmatism or a spectacle lens that generates astigmatism. The degree of astigmatism of the ophthalmic optical system and the degree of astigmatism of the refractive body correspond to the degree of bokeh of the created bokeh image S. Therefore, based on the information about the sensitivity of the wearer W obtained with respect to the bokeh image S corresponding to the different degrees of bokeh, the optical properties such as astigmatism of the spectacle lens to be designed are appropriately matched to the wearer W. can be set.

3 is a conceptual diagram for explaining a method of creating a bokeh image S. As shown in FIG. In the method of creating the bokeh image S, the distance between the wearer W and the bokeh image S (corresponding to Df, Dm, and Dn described above) is separated from the front surface of the eyeball 90 when the bokeh sensitivity test is performed. Ray tracing from each point of the original image So is performed by arranging the original image So at the position, and placing the spectacle lens L in the optical path from the original image So to the retina of the eyeball 90. . The calculation of the ray tracing can be appropriately performed using a PC or the like.

In Fig. 3, as an example of a ray for ray tracing, a luminous flux F1 from the upper end in the drawing of the original image So is shown using a broken line, and a luminous flux F2 from the lower end in the drawing of the original image So. ) is shown using a solid line. In the example of FIG. 3 , the light rays from the original image So are converged behind the retina by refraction by the spectacle lens L and the ophthalmic optical system in the eyeball 90 . That is, the focus is not on the retina. In this case, the image projected on the retina becomes blurry to the extent that it is out of focus. By a known ray tracing calculation, it is possible to obtain a distribution of the amount of light from the original image So reaching the projection plane B including the intersection of the optical axis and the retina perpendicular to the optical axis of the ophthalmic optical system. Based on the distribution of the amount of light reaching on the projection surface B obtained by this ray tracing, the distribution of the bokeh image S (for example, distribution of luminance or density of color in the case of a printed image) is determined.

In the model for performing ray tracing shown in Fig. 3, by appropriately changing optical properties of the spectacle lens L or the like, it is possible to create a bokeh image S having different degrees of bokeh. It is also preferable to create by changing the astigmatism or the like of the spectacle lens L to obtain a corresponding relationship between the degree of bokeh of the bokeh image S and the aberration.

When creating a plurality of bokeh images used for the bokeh sensitivity test, the aberration is expressed as the amount of aberration of the spectacle lens or the amount of the eyeball, for example, the minimum amount of aberration 0D to the maximum amount of aberration 1D to 3D, , are created at arbitrary intervals such as 0.1D, 0.25D, or 0.5D between them. In the case of an aberration having directionality such as astigmatism, the angle of the aberration is changed at an arbitrary interval between 15 degrees and 90 degrees to create a bokeh image.

It is also possible to synthesize a plurality of aberrations or spherical power errors within the above range, rather than a single aberration. In the creation of the bokeh image S, the ray tracing may be performed using an eye model constructed in consideration of the distance to the object, the age of the wearer W, the strength of the accommodative power, and the like. Thereby, the bokeh image S can be created more precisely in consideration of the change in the accommodative force of the eye.

In the spectacle lens design method of the present embodiment, the target aberration at one or a plurality of points of the spectacle lens to be designed and the upper limit value of the permissible aberration can be set based on the obtained information on the sensitivity of the wearer W. there is.

Hereinafter, an example of designing a progressive-power lens including a distance part having a refractive power corresponding to a distance and a near part having a refractive power corresponding to a short distance by performing a bokeh sensitivity test at a distance and a short distance will be described below.

A spectacle lens ordering system according to the design of spectacle lenses will be described. The spectacle lens ordering system according to the present embodiment can provide a spectacle lens in which optical properties such as aberration are appropriately set according to the sensitivity to bokeh in the visual field of the wearer W as described above.

4 is a diagram showing the configuration of the spectacle lens order/order system 10 according to the present embodiment. The spectacle lens ordering system 10 includes an ordering device 1 installed at an optical shop (orderer), an ordering device 2 installed at a lens maker, a processing machine control device 3, and a spectacle lens processing machine 4 . is composed by The ordering device 1 and the ordering device 2 are communicatively connected via a network 5 such as the Internet, for example. Further, a processing machine control device 3 is connected to the order receiving device 2 , and a spectacle lens processing machine 4 is connected to the processing machine control device 3 . In addition, although only one ordering device 1 is described in FIG. 4 for the sake of illustration, in reality, a plurality of ordering devices 1 provided in a plurality of opticians are connected to the ordering device 2 .

The ordering device 1 is a computer that executes ordering processing for spectacle lenses, and includes a control unit 11 , a storage unit 12 , a communication unit 13 , a display unit 14 , and an input unit 15 . . The control unit 11 controls the ordering device 1 by executing the program stored in the storage unit 12 . The control unit 11 includes an ordering processing unit 111 that executes ordering processing for spectacle lenses. The communication unit 13 performs communication via the order receiving device 2 and the network 5 . The display unit 14 is, for example, a display device such as a CRT or a liquid crystal display, and displays an order screen for inputting information (order information) of spectacle lenses to be ordered. The input unit 15 includes, for example, a mouse, a keyboard, or the like. For example, via the input unit 15, order information according to the contents of the order screen is input.

In addition, the display part 14 and the input part 15 may be comprised integrally by a touch panel etc.

The order receiving device 2 is a computer that executes order receiving processing, designing processing, optical performance arithmetic processing, and the like for spectacle lenses, and includes a control unit 21 , a storage unit 22 , a communication unit 23 , and a display unit 24 . ) and the input unit 25 . The control unit 21 controls the order receiving device 2 by executing the program stored in the storage unit 22 . The control unit 21 includes an order receiving processing unit 211 for executing an order receiving processing for spectacle lenses, and a designing unit 212 for executing a spectacle lens design processing. The communication unit 23 performs communication via the ordering device 1 and the network 5 , or communicates with the processing machine control device 3 . The storage unit 22 readably stores various data for spectacle lens design. The display unit 24 is, for example, a display device such as a CRT or a liquid crystal display, and displays the design result of the spectacle lens and the like. The input unit 25 includes, for example, a mouse, a keyboard, and the like.

In addition, the display part 24 and the input part 25 may be comprised integrally by a touch panel etc.

Next, the procedure for providing spectacle lenses in the spectacle lens ordering system 10 will be described using the flowchart shown in FIG. 5 . On the left side of Fig. 5, the procedure executed by the optician is shown, and on the right side of Fig. 5, the procedure executed on the lens maker side is shown. In the spectacle lens manufacturing method in the spectacle lens order/order system 10, the spectacle lens is designed by the above-described spectacle lens design method.

In step S11, the orderer acquires information about the sensitivity of the wearer W to the bokeh.

6 is a flowchart illustrating the step S11 by further dividing the step S11 into a plurality of steps. In step S111, the orderer adjusts the eyesight of the wearer W by using a corrective lens or the like, and the wearer W clearly recognizes the original image So at a distance at which the bokeh sensitivity test is performed. make it possible When step S111 is finished, the process proceeds to step S112.

In step S112, the orderer presents a plurality of bokeh images S created by subjecting the original image So to different degrees of bokeh at positions located near, intermediate, and far from the wearer W, , make the wearer acknowledge it. In the present embodiment, the ordering party sequentially presents a plurality of bokeh images S at a distance, for example, at a distance of 2 m from the wearer W, in order to create a progressive refractive power lens for near and far. The ordering party sequentially presents a plurality of bokeh images S similarly to a short distance such as 30 cm from the wearer W, for example.

The order of presenting the bokeh images S having different degrees of bokeh is not particularly limited, but so as not to cause familiarity with the bokeh, an image with a sufficiently small degree of bokeh acceptable to the wearer is at least once in a ratio of several images. It is preferable to present it as When step S112 is finished, the process proceeds to step S113.

In step S113, the orderer acquires information about the sensitivity to bokeh in the visual field of the wearer W. The client listens for the degree of bokeh that the wearer W can tolerate, for each distance. The orderer converts the intensity of the sensitivity of the wearer W to bokeh with respect to each distance into a numerical value according to a predetermined standard and records it. When step S113 is finished, the process proceeds to step S12.

In addition, after executing steps S111 to S113 for a certain distance, the process returns to step S11 again and may be configured to perform a bokeh sensitivity test for different distances. Thereby, for each distance, a calibration method suitable for the distance can be used. For example, in the design of a progressive-power lens, in the case of near-field measurement, the spherical power is added to the prescription of the distance part according to the required addition degree of the lens, and the correction is performed after performing the measurement. etc., can be appropriately determined.

In step S12, the orderer determines the ordering information of the spectacle lens to order, including the information about the sensitivity to bokeh in the visual field of the wearer W acquired in step S113. Then, the orderer displays an order screen on the display unit 14 of the ordering device 1 , and inputs order information through the input unit 15 .

7 is a diagram illustrating an example of the order screen 100 . In the lens information item 101, items related to the lens order power, such as the brand name of the lens to be ordered, the spherical power (S power), the astigmatism power (C power), the astigmatism axis, and the addition degree, are input. The processing designation information item 102 is used when designating the outer diameter of a lens to be ordered or when designating an arbitrary point thickness. The dyeing information item 103 is used when designating the color of the lens. The fitting point (FP) information 104 inputs positional information of the wearer W's eyes. PD stands for pupillary distance. In the frame information item 105, a frame model name, frame type, and the like are input. In the sensitivity information item 106, a numerical value indicating the strength of the sensitivity to the bokeh in the distance and near-field bokeh sensitivity tests is input. In the example of FIG. 7 , the intensity of the sensitivity to bokeh was expressed as a numerical value in 10 steps at each of the far and near (“5” at a distance, “4” at a close range). In the example of FIG. 7 , the intensity of the sensitivity to bokeh is defined so that the greater the number, the stronger the sensitivity to the bokeh.

The images used in the bokeh sensitivity test are prepared as follows.

An image created with the minimum amount of aberration is set to 10, and an image created with the maximum amount of aberration is set to 0, and each image is divided into 10 stages. Then, the division of the image of the bokeh that the wearer said is acceptable to the maximum is set as a measurement value of the intensity of the sensitivity.

In addition, regarding the method of expressing sensitivity to bokeh, the smaller the sensitivity to bokeh, the larger the number may be, or it may be defined as a symbol rather than a number, and the sensitivity to bokeh can be expressed and conveyed according to a predetermined standard. If there is, the method is not particularly limited.

In addition, in the ordering screen 100, in addition to the above items, various information such as fitting parameters such as the foreground angle of the frame, camber angle, the distance between the eye and the lens, and information about the adjustment force of the wearer W, etc. You can add information. Further, in addition to or instead of a numerical value indicating the strength of the wearer W's sensitivity to bokeh, the calculated design parameter is input as an index indicating a range in which the astigmatism of the far and/or near-use parts is small. may do The design parameter is, for example, a line segment extending left and right on the lens image in the far-view portion or near-use portion, as indicated by a dashed arrow or a dashed-dotted arrow in FIG. 9 to be described later, and a length at which aberration becomes less than or equal to a predetermined value. etc. can be done.

When the orderer inputs each item on the order screen 100 of FIG. 7 and clicks a send button (not shown), the order processing unit 111 of the order device 1 , in each item of the order screen 100 , The input information (order information) is acquired, and the process proceeds to step S13. In step S13 , the ordering device 1 transmits the order information to the ordering device 2 via the communication unit 13 .

In the ordering device 1, the processing of displaying the order screen 100, the processing of acquiring the order information input on the ordering screen 100, and the processing of transmitting the order information to the order receiving device 2, The control unit 11 of the apparatus 1 executes a predetermined program previously installed in the storage unit 12 .

In step S21 ( FIG. 5 ), when the order receiving processing unit 211 of the order receiving device 2 receives the order information from the ordering device 1 via the communication unit 23 , it proceeds to a step S22 . . In step S22, the design unit 212 of the order receiving device 2 designs the spectacle lens based on the received order information.

8 is a flowchart showing a procedure of designing a spectacle lens corresponding to step S22. In step S221, the order receiving device 2 provides the prescription data of the spectacle lens, information on the wearer W's sensitivity to bokeh, or an index indicating a small range of astigmatism in the far and/or near areas, etc. to obtain the design parameters of The order receiving device 2 also acquires fitting parameters such as the foreground angle of the frame, the camber angle, and the distance between the eye and the lens as appropriate. When step S221 is finished, it proceeds to step S222.

In step S222, the design unit 212 of the order receiving device 2 determines the spectacle lens based on the information or design parameters regarding the sensitivity to bokeh in the visual field of the wearer W acquired in step S221. Set the target aberration.

9 is a conceptual diagram showing an example of setting the target aberration based on the sensitivity of the wearer W to bokeh. The four aberration distribution diagrams are shown in the center of the figure, and the magnitude of aberration corresponding to the pattern used to represent the magnitude of the aberration in the aberration distribution diagram is shown in the rightmost part of the figure. The dashed arrows extend left and right in the distant portion and indicate the width of a portion where the magnitude of the aberration is less than or equal to a predetermined value, and this length is an index indicating the range in which the astigmatism of the far portion is small. The dashed-dotted arrows extend to the left and right in the near-use portion and indicate the width of a portion in which the magnitude of the aberration is less than or equal to a predetermined value, and this length is an index indicating a range in which the astigmatism of the near-use portion is small. The vertical positions of the dashed arrow and the dashed-dotted arrow are arbitrarily set, but for example, it is determined based on the position of the far measuring point (the far power measuring position) or the position of the near measuring point (the near power measuring position).

Within the four aberration distribution diagrams shown in FIG. 9, the aberration distribution diagram A11 at the upper left is a lens for the wearer W with weak sensitivity to near and far astigmatism, and the range with small astigmatism is narrow, Since the change in astigmatism is small, the distortion of the contour is small. The aberration distribution diagram (A12) in the upper right is a lens for the wearer (W), in which the sensitivity of distant astigmatism is stronger than the case of the aberration distribution diagram (A11), and the range in which the astigmatism of the distant part is small is the case of the aberration distribution diagram (A11) It is designed to be wider. The aberration distribution diagram A21 in the lower left is a lens for the wearer W, in which the sensitivity of near-field astigmatism is stronger than the case of the aberration distribution diagram A11, and the range where the astigmatism of the near part is small is the case of the aberration distribution diagram A11. It is designed to be wider. The aberration distribution diagram (A22) on the lower right is a lens for the wearer (W) whose sensitivity to near and far astigmatism is stronger than the case of the aberration distribution diagram (A11). It is designed wider than the case of (A11).

In step S223 (FIG. 8), the order receiving device 2 determines the shape of the entire lens of the spectacle lens. When the overall shape of the lens is determined, the process proceeds to step S224. In step S224, the order receiving device 2 determines whether optical properties such as refractive power and astigmatism of the spectacle lens satisfy desired conditions. When the desired condition is satisfied, the determination in affirmative step S224 is made, the design process ends, and the flow advances to step S23 (see Fig. 5). If the desired condition is not satisfied, a negative determination is made in step S224, and the flow returns to step S223.

In step S23 , the order receiving device 2 outputs the design data of the spectacle lens designed in step S22 to the processing machine control device 3 . The processing machine control device 3 sends a processing instruction to the spectacle lens processing machine 4 based on the design data output from the order receiving device 2 . As a result, the spectacle lens processing machine 4 processes and manufactures a spectacle lens based on the design data. A spectacle lens manufactured by the spectacle lens processing machine 4 is shipped to an optician, fitted into a spectacle frame, and provided to a customer (the wearer W).

In addition, in the order receiving device 2 , the processing for receiving order information from the ordering device 1 , the processing for designing the spectacle lens based on the received order information, and the design data of the spectacle lens are sent to the processing machine control device 3 . The output processing is executed by the control unit 21 of the order receiving device 2 executing a predetermined program installed in advance in the storage unit 22 .

According to the above-described embodiment, the following effects are obtained.

(1) In the spectacle lens design method and spectacle lens manufacturing method of the present embodiment, a plurality of bokeh images S created by subjecting the original image So to different degrees of bokeh, are separated from the wearer W at a distance from the wearer W. , presenting at a predetermined distance, such as a medium-distance, a short-distance, etc., making the wearer W visually recognize it, and acquiring information about the sensitivity to the bokeh in the visual field of the wearer W. Accordingly, it is possible to design an appropriate spectacle lens based on the sensitivity of the wearer W to bokeh.

(2) In the spectacle lens design method of the present embodiment, the information on sensitivity is information on whether the wearer W is permissible to visually recognize the bokeh image S. Thereby, a spectacle lens suitable for the wearer W can be designed with reference to the allowable range of aberrations corresponding to the allowable bokeh image S.

(3) In the spectacle lens design method of the present embodiment, each of the plurality of bokeh images S emits light from the original image So and transmits the light passing through the spectacle lens L causing different aberrations, respectively. Created by tracking Accordingly, it is possible to create a bokeh image S that more accurately represents the bokeh generated by a refractive object such as a spectacle lens, and more accurately measure the sensitivity of the wearer W to the bokeh in the visual field.

(4) In the spectacle lens design method of this embodiment, in the ray tracing for creating different bokeh images S, the plurality of refractors each generating different aberrations have spherical power, astigmatism power, or astigmatism axis. It includes different spectacle lenses (L). Thereby, the aberration of the spectacle lens L and the degree of the bokeh of the bokeh image S are matched, and the spectacle lens L can be designed more effectively from the information on the sensitivity to the bokeh.

(5) In the spectacle lens design method of the present embodiment, the original image So is a position that is separated from the wearer W by a predetermined distance, such as a long distance, a medium distance, and a short distance, and is visually recognized by the wearer W It is an image of an object assumed to be Accordingly, it is possible to appropriately measure the sensitivity of the wearer W to the bokeh according to the situation in which the spectacle lens actually designed is used.

(6) In the spectacle lens design method of this embodiment, presenting to the wearer W a plurality of bokeh images at a plurality of different predetermined distances, wherein the plurality of predetermined distances are 25 cm or more and less than 50 cm Two or more distances selected from the group consisting of a short distance, a medium distance of 50 cm or more and less than 1 m, and a distance of 1 m or more. Accordingly, in the design of the progressive-power lens, it is possible to appropriately design the portion corresponding to each distance based on the sensitivity of the wearer W to the bokeh.

(7) In the spectacle lens design method of this embodiment, the wearer W is made to obtain corrected visual acuity, and the wearer W is made to visually recognize the bokeh image S. Accordingly, it is possible to accurately measure the sensitivity of the wearer W to the bokeh.

(8) In the spectacle lens design method of the present embodiment, the target aberration of the progressive-power lens is set based on the sensitivity information. Accordingly, it is possible to design an appropriate progressive refractive power lens based on the sensitivity of the wearer W to the bokeh.

(9) The spectacle lens ordering device according to the present embodiment provides a plurality of bokeh images S created by subjecting the original image So to different degrees of bokeh, from the wearer W at a distance, intermediate distance, near distance, etc. The input unit 15 for inputting information about the sensitivity to bokeh in the field of view of the wearer W, which is presented at a predetermined distance and acquired by making the wearer W visually recognize it, and the corresponding input via the input unit 15 and a communication unit 13 for transmitting the information or design parameters calculated based on the information to the spectacle lens ordering device. Accordingly, it is possible to order spectacle lenses in consideration of the sensitivity of the wearer W to bokeh.

(10) The spectacle lens ordering device according to the present embodiment provides a plurality of bokeh images S created by subjecting the original image So to different degrees of bokeh, from the wearer W to a distance, intermediate distance, near distance, etc. A receiving unit that receives information about the sensitivity to bokeh in the visual field of the wearer W obtained by presenting it at a predetermined distance and making the wearer W visually recognize it, or a design parameter calculated based on the information, and the information Alternatively, a design unit for designing the spectacle lens based on the design parameters is provided. Accordingly, it is possible to order and design spectacle lenses in consideration of the sensitivity of the wearer W to bokeh.

The following modifications are also within the scope of the present invention and can be combined with the above-described embodiments.

(Modification 1)

In the above-described embodiment, the bokeh image S was created by ray tracing from each point of the original image So, but a Point Spread Function (PSF) is calculated by ray tracing from one point, The bokeh image S may be created by convolutionally integrating the luminance and color density of each point of the original image So using a distribution function.

Fig. 10A is a conceptual diagram showing the creation of a bokeh image S4 due to a refractive power error in the case where astigmatism is not generated. A symbol with an X inside a circle represents a convolutional integral. When the original image So is convolutionally integrated by a point distribution function corresponding to the point distribution P1 having no direction dependence, an image such as the bokeh image S4 in which each point is uniformly blurred is obtained. Hereinafter, the bokeh image S4 is appropriately referred to as a direction-independent bokeh image.

Fig. 10B is a conceptual diagram showing the creation of the bokeh image S5 in the case where astigmatism occurs. A symbol with an X inside a circle represents a convolutional integral. When the original image So is convolutionally integrated with a point distribution function corresponding to a point distribution P2 having direction dependence (a direction of 45 degrees oblique), an image in which each point such as the bokeh image S5 is blurred toward an oblique direction is obtained. is obtained Hereinafter, the bokeh image S5 is appropriately referred to as a direction-dependent bokeh image. The direction dependence of the direction-dependent bokeh image S may be determined based on the direction of the astigmatism axis of the wearer W.

The direction-dependent bokeh image and the direction-independent bokeh image are optical properties of a refracting body such as a spectacle lens L inserted into an optical path by the method shown in Fig. 3 in which rays are traced from each point of the original image So. By adjusting , it is possible to appropriately obtain a desired degree of bokeh.

In the spectacle lens design method of the present modification, the plurality of bokeh images S includes a plurality of refractive bodies generating different aberrations in light emitted from points at predetermined distances, such as far, intermediate, and near distances, from the retina. Each can be created based on a point distribution function obtained by tracing a ray when it passes through and enters the retina. Thereby, the bokeh image S of various aspects can be created simply.

(Modification 2)

In the above embodiment, the bokeh image S is created by ray tracing, but using a computing device such as a PC, the luminance or color density of each point of the image is synthesized using a specific distribution function as a kernel. The bokeh image S may be created by image processing for multiplication calculation. Thereby, various bokeh images S can be created by a simple method.

(Modified example 3)

Although the design method of the above-described embodiment has been described as an example of setting the target aberration of the progressive-power lens, it is not necessary to limit the content to this. Even with respect to the monofocal lens, design can be performed using information about the sensitivity of the wearer W. As shown in FIG. In the design of the monofocal lens, based on the information on the sensitivity of the wearer W, it is possible to set the spherical power error and astigmatism, which are the deviations of the refractive power from the spherical power at the periphery of the lens.

Fig. 11 is a diagram showing an example of the setting of the spherical power error and astigmatism of the single-focal lens. 11A to 11C, the distribution of spherical power error and the distribution of astigmatism are shown, and in the rightmost part of the figure, the spherical power error or aberration corresponding to the pattern used in the distribution is shown. size is shown.

Fig. 11A is a diagram showing an example of a design that places importance on astigmatism. As for the monofocal lens with the distribution of spherical dioptric power error (E1) and distribution (A1) of astigmatism in FIG. 11A, the size of astigmatism is suppressed, so the wearer W with strong astigmatism sensitivity It is very preferably used for Fig. 11B is a diagram showing an example of a design that emphasizes the balance between the spherical power error and the astigmatism. In the monofocal lens with the distribution of spherical power error (E2) and astigmatism (A2) of FIG. 11(b), the magnitude of astigmatism is larger than that of the example of FIG. 11(a), but the spherical power Since the error is suppressed, the sensitivity of astigmatism is preferably used for the average wearer W. Fig. 11C is a diagram showing an example of a design that emphasizes the spherical dioptric power. In the monofocal lens with the distribution of spherical power error (E3) and distribution (A3) of astigmatism in FIG. 11C, the size of the spherical power error is suppressed, so the wearer W with weak astigmatism ) is preferably used.

In the spectacle lens design method of this modification, the target aberration of the periphery of the monofocal lens is set based on the information on the sensitivity to bokeh. Thereby, regarding the peripheral portion of the field of view, it is possible to provide a monofocal lens suitable for the wearer W in consideration of the wearer's sensitivity to bokeh.

(Variation 4)

In the above-described embodiment, the design parameters may be set as follows based on the measured values of the wearer's bokeh susceptibility test and statistical data of a large number of testers who have undergone the bokeh susceptibility test.

The mean value M and standard deviation σ of the measured values of distant bokeh sensitivity are calculated from the test results previously performed on a large number of (eg, 30 or more) testers. The tester may divide the test by age, for example, in the case of a progressive power lens, a tester over 40 years old, and in the case of a monofocal lens, a tester under 40 years old. The far-field sensitivity range constant K may be any value between one and three times the standard deviation σ of the measured value. For example, when the high and low differences in sensitivity of far-field aberrations are largely reflected in the design of the lens, the K value is made small. Conversely, when the high and low differences in the sensitivity of far-field aberrations are reflected in the lens design, the K value can be taken large. there is.

The distance design parameter P is derived from the wearer's distance sensitivity measurement D

P = (D-M)/K

is calculated in the form of The target value Rtf of the range in which the astigmatism of the distant part is small is calculated as follows by using the design parameter P from the maximum value Rfmax and the minimum value Rfmin.

Rft = (Rfmax+Rfmin)/2 + P*(Rfmax-Rfmin)/2

The same calculation is performed for close range. However, in the case of Rft>Rfmax, Rft shall be Rfmax, and in the case of Rft<Rmin, Rft shall be Rfmin.

In the same way, the target value Rnt of the area where the astigmatism of the near part is small is obtained.

Among the four aberration distribution diagrams shown in Fig. 9, the aberration distribution diagram A11 at the upper left is a lens in the case where the design target values for the area in which the astigmatism at the near and far distances are small are both minimum values Rfmin and Rnmin, Although the range in which the score difference is small is narrow, since the change in astigmatism is small, distortion of the outline is small. In the aberration distribution diagram A12 in the upper right corner, the design target value for the area of the range with small astigmatism of the far distance part is the maximum value Rfmax, and the design target value for the area with the area with the small astigmatism of the near part is the minimum value Rnmin. , and is a lens for the wearer W, in which the sensitivity at a distance is stronger than the case of the aberration distribution A11. In the aberration distribution diagram A21 in the lower left corner, the design target value for the area in the range with small astigmatism in the far part is the minimum value Rfmin, and the design target value for the area in the range where the astigmatism in the near part is small is the maximum value Rnmax. It is a lens for the wearer W, in which the sensitivity of near-field astigmatism is stronger than that of the aberration distribution diagram A11. The aberration distribution diagram A22 in the lower right is a lens in the case where the design target values of the area with small near and far astigmatism are the maximum values Rfmax and Rnmax of both, and the sensitivity of near and far astigmatism is aberration It is a lens for the wearer W who is stronger than the case of the distribution diagram A11.

The target value of the design is determined by the values of the distant target value Rft and the short-range target value Rnt in the range of the quadrangle having these four angles.

Further, based on the sensitivity information, a target area of a range with small astigmatism may be set even for the intermediate portion of the progressive-power lens.

In this modified example, the target area of a range with small astigmatism in at least two regions selected from the distance, intermediate, and near parts of the progressive-power lens can be set based on the sensitivity information. Accordingly, it is possible to provide a progressive refractive power lens more suitable for the wearer based on the wearer's sensitivity to bokeh.

This invention is not limited to the content of the said embodiment. Other aspects that can be considered within the scope of the technical spirit of the present invention are also included within the scope of the present invention.

The disclosure content of the following priority base application is incorporated herein by reference.

Japanese Patent Application No. 2016-233004 (filed on November 30, 2016)

1: ordering device 2: ordering device
9: Addition degree characteristic graph 10: Glass lens order ordering system
11: control unit of the ordering device 13: communication unit of the ordering device
21: control unit of order receiving device 23: communication unit of order receiving device
100: order screen 106: sensitivity information item
S : Bokeh image So : Original image
W: wearer

Claims (18)

Presenting a plurality of bokeh images created by subjecting the original image to different degrees of bokeh corresponding to at least one of the degree of astigmatism of the ophthalmic optical system and the magnitude of the aberration of the spectacle lens, and causing the wearer to visually recognize it;
obtaining information about the sensitivity of the wearer to bokeh;
Designing spectacle lenses based on the information on the sensitivity of the wearer to bokeh,
Each of the plurality of bokeh images is created by ray tracing light emitted from the original image and passing through a refracting body generating different aberrations.
How spectacle lenses are designed. The method according to claim 1,
The information on the sensitivity is information on whether it is permissible for the wearer to recognize the bokeh image.
How spectacle lenses are designed. delete The method according to claim 1,
The plurality of bokeh images are each created based on a point distribution function obtained by tracing rays when light emitted from a point at a predetermined distance from the retina passes through a plurality of refractors generating different aberrations and enters the retina. felled
How spectacle lenses are designed. The method according to claim 1,
The plurality of refractive bodies generating the different aberrations include spectacle lenses having different spherical powers, astigmatism powers, or astigmatism axes.
How spectacle lenses are designed. The method according to claim 1,
Each of the plurality of bokeh images is created by image processing that performs a convolution operation of the luminance or color density of each point of the original image based on an arbitrary distribution function.
How spectacle lenses are designed. The method according to claim 1,
The original image is an image of an object assumed to be visually recognized by the wearer at a position separated by a predetermined distance from the wearer.
How spectacle lenses are designed. The method according to claim 1,
presenting to the wearer the plurality of bokeh images at different plurality of predetermined distances.
How to design spectacle lenses. The method according to claim 1,
In a state in which the wearer has obtained corrected vision, the wearer can visually recognize the bokeh image.
How spectacle lenses are designed. 10. The method according to any one of claims 1, 2 and 4 to 9,
Setting the target aberration of the progressive power lens based on the information on the sensitivity
How spectacle lenses are designed. 10. The method according to any one of claims 1, 2 and 4 to 9,
setting a target area of a range with small astigmatism in at least two regions selected from the distance, intermediate, and near parts of the progressive power lens based on the sensitivity information
How spectacle lenses are designed. 10. The method according to any one of claims 1, 2 and 4 to 9,
Setting a target aberration of the periphery of the monofocal lens based on the information on the sensitivity
How spectacle lenses are designed. Designing a spectacle lens by the design method according to any one of claims 1, 2, and 4 to 9
A method for manufacturing spectacle lenses. The wearer, obtained by presenting a plurality of bokeh images created by subjecting the original image to different degrees of bokeh corresponding to at least one of the degree of astigmatism of the ophthalmic optical system and the magnitude of the aberration of the spectacle lens, and making the wearer visually recognize it, an input unit for inputting information about sensitivity to bokeh;
a transmitting unit for transmitting the information input through the input unit or a design parameter calculated based on the information to a spectacle lens ordering device;
Each of the plurality of bokeh images is created by ray tracing light emitted from the original image and passing through a refracting body generating different aberrations.
Glasses lens ordering device. The wearer, obtained by presenting a plurality of bokeh images created by subjecting the original image to different degrees of bokeh corresponding to at least one of the degree of astigmatism of the ophthalmic optical system and the magnitude of the aberration of the spectacle lens, and making the wearer visually recognize it, a receiver for receiving information on sensitivity to bokeh or a design parameter calculated based on the information;
a design unit for designing spectacle lenses based on the information or the design parameters;
Each of the plurality of bokeh images is created by ray tracing light emitted from the original image and passing through a refracting body generating different aberrations.
Glasses lens ordering device. A device comprising the spectacle lens ordering device according to claim 14 and the spectacle lens ordering device according to claim 15 .
Glasses lens ordering system. delete delete

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